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Updated: Jun 27, 2026
An Improved Mechanical Testing Method to Assess Bone-implant Anchorage
Published on: February 10, 2014
[Osseointegration of orthodontic microscrew implants under immediate loading in dogs]
Yan Chen1, Wen-ting Zhao, Hee-Moon Kyung
1Department of Orthodontics, School of Dentistry, Kyungpook National University, Daegu 700-412, Korea.
Objective:
To investigate the osteointegration of with self-drilling and self-tapping microscrew implants under immediate loading histomorphometrically.
Methods:
The buccal side of upper and lower jaws of three dogs was chosen as implant receipt site. Each dog accepted 8 implants (4 self-drilling and 4 self-tapping implants). Approximately 1.47-1.96 N continuous and constant forces were immediately applied between two microscrew implants with nickel-titanium coil spring for 9 weeks. Undecalcified sections of implants and surrounding tissue were studied with light microscope and fluorescent microscope.
Results:
Osteointegration was seen in all samples and no fibrous tissue was seen between bone and implant. More original bone was seen in self-drilling group. Modeling and remodeling were more active in self-tapping group. Bone-to-implant contact values were statistically significant higher in self-drilling group [(41.7 +/- 10.7)%] than in self-tapping group [(25.9 +/- 8.0)%, P<0.01].
Conclusions:
Immediate loading had no influence on osteointegration in both self-drilling and self-tapping groups. The rates of bone-to-implant contact were higher in self-drilling group.
